His co-worker, Robin Hubbell, said Osborne is always working and even come in on his days off to help out.

"I jokingly say that when I grow up, I'm going to be just like him," Hubbell said. "It wouldn't be the same without him.

Osborne reminisced on the changes at USPS over the past five decades, a big one being the type of trucks the mail is delivered in. He laughed about delivering mail in icy weather, once causing him to slide all the way down a hilly driveway on his feet.